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Table IX. Comparisons of Committed Effective Dose Equivalent Detection Limits
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Internal Dosimetry - index
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Routine Radiological Worker Dose Management


DOE-STD-1121-98
Table X. Comparison of Methods of Assessing Dose from Intakes of Radionuclides
Method
Type
Accuracy
Precision
Sensitivity
Cost
3
H urinalysis
Bioassay
High
High
High
Low
239
Pu urinalysis
Bioassay
Moderate
Low
Very low
High
239
Pu air monitoring
Air monitoring
Very low
Moderate
Moderate
Moderate
Radon progeny air
Air monitoring
Moderate
Moderate
Moderate
Moderate
monitoring
7.7.1 Uncertainties Associated with Preliminary Evaluations
Preliminary dose evaluations, when based on bioassay data obtained within the first few days of an
intake by inhalation, may be very uncertain. It is not uncommon for such preliminary evaluations to be
wrong by a factor of 10 either direction. It is thus very important not to overreact to initial dose
assessments, which may be revised either upward or downward when bioassay data over a period of
weeks or months become available.
7.7.2 Uncertainties Associated with Final Evaluations
Even when all bioassay data are consistent with a plausible biokinetic model, in many cases there are
still significant uncertainties in doses assessed from bioassay data. This is especially true of intakes of
actinides and doses from intakes of unknown time course and unknown physical and chemical form. For
significant intakes, it is desirable, although not always feasible, to quantify and document the uncertainty
associated with a final dose assessment.
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